After selecting your players, a loading screen will appear with four picture icons,basketball,turntable,shoe,meagphon, and/or basketballhoop, at the bottom of the screen. You have 10 seconds to enter the code. To change the icons use the A,B,Y, and X bottons. Once you have entered the code push the Control Pad/Stick up to confirm it. The name of the code will appear above the code you entered if you entered it correctly. The codes will work before you earn them as well.